thesoggy / ip Goto Github PK

    private boolean tasksEnd = false;

    public static Command parseCommand(String input) throws DukeException {
        String[] inputs = input.split(" ", 2);
        CommandType commandType = CommandType.fromString(inputs[0].toUpperCase());

        if (commandType == null) {
            throw new DukeException("Invalid command: Please try again.");
        }

        String description;

        switch (commandType) {
        case BYE:
            return new ByeCommand();
        case LIST:
            return new ListCommand();
        case EMPTY:
            return new EmptyCommand();
        case MARK:
            if (inputs.length == 1) {
                throw new DukeException("Wrong number of arguments.");
            }
            try {
                int index = Integer.parseInt(inputs[1]) - 1;
                return new SetDoneCommand(index, true);
            } catch (NumberFormatException e) {
                throw new DukeException("Invalid argument: Index of task should be a number.");
            } catch (IndexOutOfBoundsException e) {
                throw new DukeException("Invalid argument: Index of task should be between 1 and the number of tasks.");
            }
        case UNMARK:
            if (inputs.length == 1) {
                throw new DukeException("Wrong number of arguments.");
            }
            try {
                int index = Integer.parseInt(inputs[1]) - 1;
                return new SetDoneCommand(index, false);
            } catch (NumberFormatException e) {
                throw new DukeException("Invalid argument: Index of task should be a number.");
            } catch (IndexOutOfBoundsException e) {
                throw new DukeException("Invalid argument: Index of task should be between 1 and the number of tasks.");
            }
        case TODO:
            if (inputs.length == 1) {
                throw new DukeException("Wrong number of arguments.");
            }
            description = inputs[1];
            if (description.length() == 0) {
                throw new DukeException("Invalid argument: Description cannot be empty.");
            }
            return new AddTaskCommand(new TodoTask(description, false));
        case DEADLINE:
            if (inputs.length == 1) {
                throw new DukeException("Wrong number of arguments.");
            }
            try {
                description = inputs[1].substring(0, inputs[1].indexOf(" /by "));
                if (description.length() == 0) {
                    throw new DukeException("Invalid argument: Description cannot be empty.");
                }
                String deadline = inputs[1].substring(inputs[1].indexOf(" /by ") + 5);
                if (deadline.length() == 0) {
                    throw new DukeException("Invalid argument: Deadline cannot be empty.");
                }
                return new AddTaskCommand(new DeadlineTask(description, Parser.parseDateTime(deadline), false));
            } catch (StringIndexOutOfBoundsException e) {
                throw new DukeException("Invalid argument: Use /by flag to specify the deadline of the task");
            }
        case EVENT:
            if (inputs.length == 1) {
                throw new DukeException("Wrong number of arguments.");
            }
            try {
                description = inputs[1].substring(0, inputs[1].indexOf(" /at "));
                if (description.length() == 0) {
                    throw new DukeException("Invalid argument: Description cannot be empty.");
                }
                String time = inputs[1].substring(inputs[1].indexOf(" /at ") + 5);
                if (time.length() == 0) {
                    throw new DukeException("Invalid argument: Event time cannot be empty.");
                }
                return new AddTaskCommand(new EventTask(description, Parser.parseDateTime(time), false));
            } catch (StringIndexOutOfBoundsException e) {
                throw new DukeException("Invalid argument: Use /at flag to specify the date and time of the event.");
            }
        case DELETE:
            if (inputs.length == 1) {
                throw new DukeException("Wrong number of arguments.");
            }
            try {
                int index = Integer.parseInt(inputs[1]) - 1;
                return new DeleteTaskCommand(index);
            } catch (NumberFormatException e) {
                throw new DukeException("Invalid argument: Index of task should be a number.");
            } catch (IndexOutOfBoundsException e) {
                throw new DukeException("Invalid argument: Index of task should be between 1 and the number of tasks.");
            }
        default:
            throw new DukeException("Invalid command: Please try again.");
        }
    }